Circuit making and breaking device.



No. 847,299. ,P;ILTENTED MAR. 12, 1907-.

F. L. WILLARD.

CIRCUIT MAKING AND BREAKING DEVICE.

APPLICATION FILED FEB. 14, 1906.

J WITNESS A TTORNEYS ri'irrrso srarr @FFEGE.

FREBERICK L. WILLARD, OF NEW YORK, N. Y., ASSIG'NOR F ONE-HALF TO WEIDERMAN, OF NEW YORK, N. Y.

GEFRGHET Eth tKlNGz AND EEEAEUNG DEVlGEn so. a iases.

$peeification of Letters Patent.

Patented March12, 19012 Original application filed October 2, 1905, Serial No. 280,928. Divided mid this application filed February M, 1906. sci-a1 No. 301,033.

To (111/ whom it may concern:

it known that i, FREDERICK L. NIL- Lann, a subject of the King of Great Britain, and residing at hfew York, in the county of BW York and State of New York, have inve ted certain new and useful improvements in Circuit Making and Breaking Devices, of 'aa. the following is a specification, such as v enable those skilled in the art to which it pertains to make and use the same.

"he object of my invention is to provide a t--breaker designed to he used in connec with electricai operating devices-' controllers for electric motors, elevators, electrical sign dispiays and the like and. a rther object being to proviso a mag netic circuit breaker in which the magnet is 'l upon to exert but very little power in er to accomplish the object for which it is gned. by a minimum expenditure ofelectrical energy; and with these and other ob.- jects in view the invention consists in a device constructed as hereinafter describedand claimed.

application. is a division or another application, filed-by me October? 1905, Serial his. 2%,328; and the invention, as de scribed and claimed hereinjis fully disclosed in the following specification, of which the accompanying drawing forms a part, in which the separate parts of my improvement are designated by suitable reference charactors in each of the views, and in which-- 3 5 Figure 1 is a front elevation of a series of such circuit-breakers. as preferably arranged in connection with a controlling device for electric elevators or other apparatus of such nature; Fig. 2, a side elevation of my invention; Fi 3, a partial section on the line 3 3' or" 1 and Fig. l, a diagrammatic view of a controlling device in which my magnetic circuit-breaker is employed. j

l: *3 drawing forming part of this specification. 1 have shown a plate or, preferably composed of slate or other non -conducting material, upon which is placed a casing o and upon the outer face of which is mounted a base-plate a also composed of slate or other non-conducting material, and within the casing a although not shown in the drawings. suitable electrical devicessuch as resistances, solenoid, &c.can be located.

netieally-operating switchwith attached forwar magnetic circuit-breakers a four of which Y are shown in front elevation in Fig. 1 and 1 one of which is shown in side elevation in. Fig. 2. This device consists of a supportingirame having at its lower and two rojecting lugs 3), between which is pivota ly con 6o nected an armature I). This support I) has at its lower end a projecting block b and the lower end of the armature b has also a projecting extension 23*, which is provided with an adjustable set screw b and a lock-nut b. 5 The set-screw b impinges upon the block 6 whenever the armature b is in'its normal position, and this is adapted to regulate the vertically-inclined position of the armature and to limit its return movement. per end of the supporting-frame 7) is provided with a. projecting stud c, which forms the core for the solenoid c placed thereon; The upper extension of the armature t is provided with'an inner projecting insulated arm d, which in its forward movement and when the armature b is attracted to the magnet 1: comes in contact with one or" the members of asprin -c0ntactjl At the completion of the movement of the armature 5 said projecting arm 11 has separated the two memers pl; and of the spring-contact f, and

I there v bro en any current which otherwise is provided with an automaticall -adjustable piston-contact plate g, which atter is designed to be brought in contact with a car bon block h, which is fastened to the insulat- 9 ing base-plate a by means of the collar h the latter being provided also with a bindingpost k in order to make the necessary electrical connection with other parts of the circuit. The contactpiston g is provided with a shank g, whici'i passes through a corresponding opening g in the upper part of the armature b arid provided also with a compressionsprim g, which normally rests within a suitab e recess 9 of the armature 6 A binding-post at the outer end of the shank 9 provides means of electrical connections, such as conductdrs i, with one of the lugs b of the main support 3;. For the purpose of obtaining the best results and easier [o5 The up- 70 soon as the magnet becomes rncrgized but f for the purpose of making a perfect contact between the outer face of the piston-plate g and the outer plate of the block it the shank g, well as the compression-spring g, are designed to operate freely within the recess 9 and the bore 9!, through which the shank passes.

In the operation of my device and when applied to any electrical controlling apparatus, such as illustrated in Fig. 4, it becomes of considerable interest to the users of such devices to have the necessary work performed with as little waste of energy as possible to be effective and at the same time simple in con struction. For this reason the armature b is mounted so as tohold a vertical backopen of the resistance, and it obtains such a position by reason of force of gravity With out the expenditure of any other energy. As

little force is needed to attract the armature to a working or operative until the armature-lever has been attracted close to the core of the magnet, and when the arm (1 has been brought to bear against the spring-contact f the armature is in its most effectlye position to finish its advancing motion, and thereby en the contactf. The piston-plate g at t e same time has been brought to bear against the face of the carbon block it and makes and holds close eontaet therewith by means of the compressions ring 9 thereby b eo1npression-spring g fcfces the armature b 'hackwardly, which when assuming its vertical position falls by force of gravity back to position and net "Wardly-inclined position when the circuit is 1 insuring a perfect contact. is soon as the magnet is deenermzed the senses ,its normal backwardiy-inclined position.

For the purpose of piston-shank g and the compression-spring move freely and easily in their bearings, as illustrated and described above. It will thus be seen that but littie eiectrical energy is reguired to break the circuit by means of my 5 invention and that it is simple and effective in all its movements.

Having fully described my invention, what claim as new, and desire to secure by Letf ters Patent, is I In a circuit-breaking device, a base-plate,

the support of the armature-lever and the springmontact devices, a contact-biock secured to the base-plate above the contact dc vices, and a springoperated plate provided with a rod which passes through the end of in connection with said contact-block, said casing and the red of the said spring-operated plate being provided with binding-posts.

in testimony that I claim the foregoing as my invention I have signed my name, in presence of the subscribing Witn sees, this.

13th day of February, 1906.

FREDERIGK' L. WILLARD Witnesses C. E. Mommas), 4 F. A. STEWART.

easy sch-adjustment the 0 with an in- 55 the armature-lever and is adapted to operate 6 5 

